Valve-spring-lifting tool



Jun 17, 1930. AA, L METTLER 1,764,519

VALVE SPRING LIFTING TOOL `Filed. Feb. 18, 1929 H 7" 7'0 KHE YS.

'Patented June' 17, 1930 nnTHUR L. Maremma, or LOMITA, fcanrroitiq:AV j

. VALVE-SPRING-LIFTING Toon f f Application'med February 1s1e29.1 seriainmasow. Y

My invention relates; to Valve springy lifting tools for use incompressing the coil spring around the stem of aV poppet valve orinternal combustion engines to release the tension of the spring uponlits supporting pin so' that the pinmay be withdrawn'and the valveremoved;k

purposeof my invention isthe provision yof a valve spring lifting toolhaving 4link connections between the movable parts thereof' whichfunctions 'to cause themovable jaw of the tool to move vin a line. whichfor all practicalpurposes isstraight andat right anglesto the4stationary jaw of the...fto ol whereby,Y the spring compressing .fforeecreated by vmovement Vofy vertically v.along the aXis of the.l Yspringin consequence of which the tooliS vBalade oper.`rv-r able to compressthespring with a minimum application of force. Mylinkconneetions `alsoprovide'a means forcompoundingthe powermanually applied tothe toolinitstransmissionfto the' Jaws of the tool fand so that such transmission isVdirect rather than indirect lasin previously conceived tools'of thischaracter.; Suche'J powercompounding means results inthe is'` operable'to compress relativelyheavy springs such as 'arezfoundin large internalcombustion engines Vand'4 with the application of a minimum amountofforce.

It is also a purpose of myl invention to providea tool infwhic'h thatjawthereof adapted to engage the" valve spring seat, is formed with aface shaped to provide vfa substantially'knife edged contact with 'the'tical purposesis o Vjawislso applied -v alve s prin'gse'at, andonethatfor all pracseat during spring compressing movement of the' jaw;whereby, Ithe forcejexerted vb y'gthe that the seat' will. not be movedlaterally andhence .cannot have bind ing engagement withthe valve stemt'ointe'rs erewith tool. f

k will describe. only'. oneform of valve spring lifting tool yembodyingmy v invention,v f andwill then the novelfeatures InAthe'accompanyingt.drawings;i Y' Y 'comprises specifically the jaw isappliedVv productionof a tool that j .is vbifurcated and provided witha'pair of ears 23 knurledj handlefQ.y

maintained centrally of *thev compressionof the spring lever asiindicated closed and in applied position toa poppet l valve.

1Fi'g. 2. isa (view: similar to Fig;

they jaws of1theftoolin 4(')pen'positio'n in the aetVofompressing.the'valve spring... z

Fig 3,. is.y a View showing the i toolin topl plan View and in appliedposition `to l'the valve'"spring,seat, v E-Fig. 4c Vis a viewfshowingthertool in end elevation.` P v eoV inveltionin present embodiment.

a lever 'S having. .att one,endfabifurcated. jaw l5 andv 'at-the otherenda handle 16, preferably round and knurledas indicated.' Betweenthe'handle and ythe jaw the lever 3S' mounting. apairof links 19, on`the earfthe upper endsof `thelinks beingpivotally oo nnectedj'toanear`y20'of a-lever M by .means be understoodfrom the .-descrip'- thetool. '.Thfe lever ed with fa jaw` 22 which shaped l inrv a particularform as will bedescribed hereinafter.,

To the rear vofthe earl7 lthe lever. .f3-y is receiving a pin 24 tofprovide..a fpivot for anop'eratingv lever L Ithat is providedwith ayround and, uThis operating lever is operativ. ely 'connectedito thelever `M by tion ofthe operation yof is likewise provid means of .apairof links26pivoted onthe lever Lat vthe pointindicated at-27 and onisprovided -with an ear 1( receiving a pin 18 for pivotally the'frearend ofthe lever-M as indicatedat "28. SA second, connection between. theklevers L and M isfalso provided which. consists of ja pair. ofiinkszee, .the

.lower ends of .which nnectedfto'the lever `L between the pivots" 24.and27 .afsindicated at 30. Y The upper endsV of the links arepivotedonthe position' Vshown 4inFigl i2 wherein the jaws 95 at 31andthelocation I'ofithis.pivot is such thatxthe links occupy aninclinedposition:f Forfretaining.vthefleverIJ inl the active f Aand 22 areseparated or vide a latch comprising to be movable to Y embrace thehandle as illustrated in Fig.

2. Io secure the handle 25 in other'positions between fully opened andfully closed position, the handle 25 is 'provided with a tongue 33havinginotches Set therein any one of which the yoke 32 is adapted toseat.

As clearly illustrated in Fig. 4, the end` o-Y the handle 16 is providedwith a slot 5,5` in which the tongue 33v -isadapted to be re! ceived topermit the yoke 32 to embrace the handle 25 or to permit the yoke toengage within the notches 34.' As' shown in Fig. h, the upper edge otthe kslot hasthe Y sidewalls thereof curvedv outwardly as indicated at36'to provide av tapered entrance for the end of the tongue 33 in orderthatV the tongue Amay read'ly enter the slot as will be understood. Y v

VIn practice, the tool is applied in the me? ner illustrated inFig. 1,thej 1 5 aindl22 beingin closed positionedl so 'that .they may/beV`readily extended beneath thevalve spring lseat indicated'at 37 and thetQp of the valve operating rodindicatedat 3S, The jaw y15 actually restson a head 3 9A of the rod 38 to form a support for the lever S so thatin vactual operation the leverfS isi sta-k tionaryr.. .Y 'i 1 ToVcompress the valve spring indicated at 40 .the handle 25 is, moveddownwardly to the position shown -in Fig. 3, and', during such movementthe lever lVIA is rockedl on its ulcrum21 through the link connection 26so that the jaw 22 is moved upwardly to the open position shown.'Ihronght this link connection 26 the power applied to the leverv L isdirectly transmitted tothe leverM, and by reason" of the relativepositions of the pivots of the two le'ver'sfand'y the link connection,it willV be manifest that movementof the lever L is compounded in itstransmission to the lever M."

As previouslyv expressed herein, a lpurpose ofm'yinve'ntion is to movethe jaw 22`in a straight line substantially, and one at right angles tothe jaw 15 inorder that atrue vertical force will bey applied toVthespring in effecting its compression. Such movement of the jaw 22 iseffected by' operation of the lever L and in the following manner;` Asthe lever L moves downwardly thelinks29 exert. av'pull on the lever Mwhichv is" rearwardly, thereby causing the links 19 to swing rearwardlyabout the pivotv 18 so as to rearwardly shift the-fulcrum 21 for thelever M. 'Thus the lever M is moved rear;

wardlyas it is rocked so that the jaw 22,'instead of moving upwardly inan arcf as would be lthe easey if the ulcrum 21 was fixed, movesvertically and substantially in a straight line. In consequence oi thisopfntin filmforen eneitnd'by the rising inw Y lare non-shiftable,andhence fixed, and Vthese pointsof Contact are across the center f 2-Avnlfe Spring opened, I pro- 22 acts along or in parallelism with thelongitudinal axis of the spring, thus permitting the tool to compressthe spring with greater ease than would be possible with a tool wherethe jaw moves in an arc.

As illustrated, the jaw 22 is onset with respect to the lever M, and itsupper or working surface is oi.cc'iiivfe;` form in'order to provide asubstantially knife edge contact with the spring seat 37. In consequenceof this knifeedge contact the lifting force exertedy'bybthe jawisimposed on the seat 37 at points which for all practical purposes as0f the Spring Sent, the Seat in its rising more' ment ywill not beshifted tovv oneside* or vthe other but will be maintainedyhorizontaIlly and thus movedY without binding engage.- ment withn thevalve stem.

Although I have herein, shownA and described only one form of valvespring lifting vinni, embodying niy inventionfitf init@ b understood,that various changes and modifiCntiOnS niny be Innle', herein Withoutdepartingfroni theysp'irit of the invention the SPi and; SQOPQ Of, theVnipiiiefl Clninisg AIclaimz'` lfln n -Ynlv Spinne` lifting wol, nnai-r, 0f levers" having' inns, fnl link' nnnnectin 'be tween the levrsrrQViding n' Shiftingy fnlcruin for one of the levers, an operating"levenpivotedf on the otlienlever, a` link con? nent-,inn between. the'Operating lever and, in@ first mentioned jaw lever by which IDQYQ*nient, 01":` thefnrrntns. 'lever Swings. the inw leven and C'Qnipnndsfits. movement, and.' n SeCQiid'link Cl.nnniinn.z between, the Operatinglever @eine San nw lever, er "Shin anche lane', as.. n; s' moves inv n"Pnili Snbs'wntially .Strniehl and nt. right. nneleslieilhinii ftheltlieleven i lifting toolI comprising `a pair ofY leversvhaying jaws,meansfconnecting'tlieleverslfor actiiating dneof'tlie levers softhatVits. jaw inovfsfin ystraightline substantially and aty right angles4t'the jaw 'of the other lever, theV jaw" of nthe firstl lever having anAouter face formed with a, convex portion s o positioned that when thetool is 'applied to a' valvep'said convex portion will engage the valvespringl seat inj siich man.- nerv that upon actuationj'of the'correspond:- inglever the inw' Willfexert ,an inward force on saidfseatto compressfthevalve spring and in a manner to maintain'said v'seatcen'.- tered on `the valve stem1 toprelvent binding therreoi *Y* .v 3; If a valve spring lifting tool, a pair of pivoted levers having handles,one' of said handles having aslotv therein, a yoke pivoted onthefs'lotted. handle, and a tonguel fixed, on the other handley andpositioned tobeA exiftended within saidslot, said tonguehaving notchesin l any.l onev on which; yokeY may wings.v SOL that. its. 'i

llO

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l engage` for latching the twohandles against into the slot.

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separatlon. Y

4. In a tool as embodied in claim 3 whereyin the Walls of the slot arebeveled rat their edges to facilitate entrance of the tongue ARTHUR L.METTLER.

